Quoted from spidey:

Just speculation here, but I would assume they decided they'd rather have full custom speech than movie snippets. I can see this being discussed when Gomez is back at TPF in March, if not addressed directly from him then by Q&A.

Quoted from TheFamilyArcade:

Just play the game. That's what it boils down to. Play the game, and then come and tell me that it immersed you in the Avengers movie experience. Stern may have wanted to make their pin feel like the movie, but they didnt. You don't know that because you haven't played it. You can go on and on about what is and isn't, but the fact is you don't have a clue.
You guys seized on the semantics of my saying, roughly, "how can the pin be based on the movie" when there's hardly any movie in the pin. Overlooking the point of the argument by focusing on the one thing that you can wrap your tiny brains around. That's what a fool does.
How many Avengers pinball players feel that the pin oozes the essence of the movie and puts them right there with the actors in the script? Or instead, do they feel their just playing a cool pinball machine with a super hero theme? For me it's the latter...and that's been my point, however badly I may have mangled it, all long.